Apparatus for driving a turntable of a disc player system

Details Apparatus for driving a turntable of a disc player system Apparatus for driving a turntable of a disc player system

1984-10-30

1986-12-16

Shoop, Jr., William M.

Electricity: motive power systems

Plural diverse motor controls

Motor-reversing

318254, 318264, 318293, 318374, H02P 310

Patent

active

046299491

ABSTRACT:
An apparatus for driving a turntable of a disc player system including a first drive voltage source for supplying a first driving voltage driving a spindle motor in a normal direction, a second drive voltage source for generating a second drive voltage for driving the spindle motor in a reverse direction, a voltage supply control circuit means for selectively supplying one of first and second drive voltages in accordance with a play command signal and a stop command signal, and a detection means for detecting the rotation of a rotor of the spindle motor in the reverse direction. When the stop command signal is supplied, the second drive voltage is supplied to the spindle motor for applying a driving torque of reverse direction to the rotor of the spindle motor and the supply of the second drive voltage is stopped immediately when the reverse direction rotation of the rotor is detected by the detection means. Thus, a very quick and accurate control of the stoppage of the spindle motor is realized.

REFERENCES:
patent: 4079942 (1978-03-01), Kunen
patent: 4460857 (1984-07-01), Michaelis
patent: 4549120 (1985-10-01), Banno et al.
IBM Technical Disclosure Bulletin, vol. 11, No. 12, May 1969, p. 1697.

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